Rspec's subject is a special variable that refers to the object being tested. It's instantiated implicitly but can also be done explicitly. Handy to be used with shoulda matchers.

In Tmux, prefix+t shows the current time in big font size

looping through a collection of records in database using methods like all is very inefficient (it tries to instantiate all objects at once) and should resort to batch processing methods eg: find_each.

ansible lets u use ansible_distribution ( values : Ubuntu, CentOS etc), ansible_distribution_release (values : xenial, precise etc) to write dist specific commands

There is a global location for git ignore *nix - ~/.config/git/ignore

open chrome devtools, press cmd(ctrl) + shift + p and type show coverage and press enter, once you reload the page you can see the amount of JS fetched and how much is actually getting used on that page

Array.from() takes a second argument which is a map. Example: Array.from(Array(10), (element, index) => //some logic to fill the array)